Matching Wishbone 4-Way Wiring to Vehicle that Uses Standard Wiring Configuration

Question:

The 5 pole flat on the trailer. Colors are. white. Yellow. Yellow/brown. Green/brown. Green. But.. The Blazer. Has 4 colors. white. Yellow. Brown. Green. I plug them together and the right side don't work?

asked by: Brandon S

Expert Reply:

The configurations you described match two different styles of 4-way wiring. Wishbone 4-way wiring where a running light circuit wire is ran to either side of the trailer (yellow/brown and green/brown on the trailer), and then standard 4-way wiring where there's only one running light circuit wire like what's on your Blazer.

The colors should match color for color in the rewiring process. The yellow/brown and green/brown wires need to run to the single brown wire pin of the Blazer wiring.

If you are using a 5-way on the trailer side and the wire colors you mentioned are all ran to an individual pin then that is the issue and combining the two running light wires will take care of the problem.

I attached a link to a help article on trailer wiring for you to check out as well.

expert reply by: Jameson C